I think my fantasy life may be too rich.
I'd best like to take a page from The Golden Mule
http://www.asstr.org/%7Eartie/tgm.html
a beautiful woman naked on a soft fur bedspread, nitrous oxide tickling her nose, while I alternated eating her out and stimulating her with a "butterfly" - all caught on tape
Miss Behavin's 45 words
http://www.missbehavin.com/fortyfive.html
The idea of giving a woman an orgasm by reaching under her dress on a restaurant's roof-top balcony was exciting. My wife role-playing a damsel in distress coming to me for help would be pretty amazing too.
Wearing masks might be fun. There's a great story about a married man who is getting flirtatious e-mails that lead to im's and then a meeting at a company sponsored masked ball. He dances with this woman and has fantastic sex with her outside, never seeing her face, never knowing who she is. He goes home, feeling terribly guilty - only to see the woman's costume hanging in his wife's closet. She had been the mystery woman all along.
I miss getting to have loud sex while listening to my neighbors do the same. Beds banging against the same wall, you keep enough privacy to not be inolved in a 4-way relationship (too complex for me). At the same you inspire each other to do your best to give pleasure.
As far as discussing it goes, my wife hates to talk about sex. I'm still trying to find a way to make it comfortable for her.